REINFORCED CONCRETE COMPOSITE BEAM Russian patent published in 2019 - IPC E04C3/293 

FIELD: construction.

SUBSTANCE: invention relates to construction, namely, to steel-concrete beam of floors of buildings. Steel-concrete composite beam includes steel thin-walled profiles, which form double-tee section, paired of two C-shaped bent sections, and concrete of concrete. Walls of thin-walled composite double tee are connected by self-tapping screws, in wall on beam support in groups in two rows in staggered order, in shelves along horizontal with different pitch, with reduction to supports, at that on walls in span in group of self-tapping screws are installed along lines main compression stresses. Screw self-tapping screws of the shelves are turned inward, the walls are turned in turns to both sides of the wall.

EFFECT: technical result consists in improvement of strength of beam.

3 cl, 2 dwg